Source code and development version

Development Version for PCs or Macs at the the PMC repository: install.packages("psych", repos="http://personality-project.org/r", type="source" )

R is a very powerful open source system for statistical computation and graphics. It consists of a language plus a run-time environment with graphics, a debugger, access to certain system functions, and the ability to run programs stored in script files. Base R is a foundation upon which more than 11,000 "packages" have been built. It is the use of these packages that makes R such a powerful tool for research.

The development of the psych package was done in conjunction with the development of the Synthetic Aperture Personality Assessment (SAPA) project and is a core part of the International Cognitive Ability Resource (ICAR) project. The SAPA project includes a personality test that uses a massively missing at random strategy to measure dimensions of temperament, ability, and interests.

More on the psych pacakge

The psych package is a work in progress. The current released version is 1.8.3. Updates are added sporadically, but usually at least twice a year. The development version is always available at the pmc repository. It may be installed using the install.packages("psych", repos="http://personality-project.org/r",type="source" ) command.

If you want to help us develop our understanding of personality, please take our test at SAPA Project.